30805434 has 80 divisors (see below), whose sum is σ = 76839840. Its totient is φ = 9145440.

The previous prime is 30805433. The next prime is 30805459. The reversal of 30805434 is 43450803.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 30805398 and 30805407.

It is not an unprimeable number, because it can be changed into a prime (30805433) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104992 + ... + 105284.

It is an arithmetic number, because the mean of its divisors is an integer number (960498).

Almost surely, 2^30805434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30805434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38419920).

30805434 is an abundant number, since it is smaller than the sum of its proper divisors (46034406).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30805434 is a wasteful number, since it uses less digits than its factorization.

30805434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 30805434 is about 5550.2643180303. The cubic root of 30805434 is about 313.4794748587.

The spelling of 30805434 in words is "thirty million, eight hundred five thousand, four hundred thirty-four".